WO2012133436A1 - Matière active d'électrode positive pour accumulateur lithium-ion, électrode positive pour accumulateur lithium-ion et accumulateur lithium-ion - Google Patents

Matière active d'électrode positive pour accumulateur lithium-ion, électrode positive pour accumulateur lithium-ion et accumulateur lithium-ion Download PDF

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WO2012133436A1
WO2012133436A1 PCT/JP2012/057976 JP2012057976W WO2012133436A1 WO 2012133436 A1 WO2012133436 A1 WO 2012133436A1 JP 2012057976 W JP2012057976 W JP 2012057976W WO 2012133436 A1 WO2012133436 A1 WO 2012133436A1
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positive electrode
lithium ion
lithium
electrode active
ion battery
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PCT/JP2012/057976
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English (en)
Japanese (ja)
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健太郎 岡本
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Jx日鉱日石金属株式会社
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Priority to JP2013507628A priority Critical patent/JP6030546B2/ja
Publication of WO2012133436A1 publication Critical patent/WO2012133436A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a positive electrode active material for a lithium ion battery, a positive electrode for a lithium ion battery, and a lithium ion battery.
  • Lithium-containing transition metal oxides are generally used as positive electrode active materials for lithium ion batteries. Specifically, lithium cobaltate (LiCoO 2 ), lithium nickelate (LiNiO 2 ), lithium manganate (LiMn 2 O 4 ), etc., improved characteristics (higher capacity, cycle characteristics, storage characteristics, reduced internal resistance) In order to improve the rate characteristics and safety, it is underway to combine them. Lithium ion batteries for large-scale applications such as in-vehicle use and load leveling are required to have different characteristics from those of conventional mobile phones and personal computers.
  • Patent Document 1 discloses: Li x Ni 1- y My O 2- ⁇ (0.8 ⁇ x ⁇ 1.3, 0 ⁇ y ⁇ 0.5, and M is Co, Mn, Fe, Cr, V, Ti, Cu, Al, Ga, Bi, Sn, Zn, Mg, It represents at least one element selected from the group consisting of Ge, Nb, Ta, Be, B, Ca, Sc and Zr, ⁇ corresponds to oxygen deficiency or oxygen excess, ⁇ 0.1 ⁇ ⁇ 0.1
  • a method for producing a positive electrode material for a lithium secondary battery characterized in that small substances are blended at a weight ratio of 0: 100 to 100: 0. And according to this, it is described that the positive electrode material for lithium secondary batteries with various balance of rate characteristics and capacity can be easily manufactured.
  • Patent Document 1 Although the lithium nickel composite oxide described in Patent Document 1 has an excessive amount of oxygen in its composition formula, there is still room for improvement as a high-quality positive electrode active material for lithium ion batteries.
  • an object of the present invention is to provide a positive electrode active material for a lithium ion battery having good battery characteristics.
  • the present inventor has found that there is a close correlation between the amount of oxygen of the positive electrode active material, the particle size of the primary particles, and the battery characteristics. That is, it has been found that good battery characteristics can be obtained by setting the positive electrode active material oxygen amount to a certain value or more and controlling the primary particle size of the positive electrode active material within an appropriate range. Further, there is a close correlation between the battery content and the alkali content on the particle surface of the positive electrode active material, the ratio of the lithium hydroxide amount A to the lithium carbonate amount B among the alkali amount on the particle surface, and I found out.
  • the ratio A / B of the lithium hydroxide amount A to the lithium carbonate amount B of the alkali amount on the particle surface is not more than a certain value. It was found that particularly good battery characteristics can be obtained.
  • Composition formula Li x Ni 1- y My O 2 + ⁇
  • M is at least one selected from Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Ga, Ge, Bi, Sn, Mg, Ca, B and Zr; 0.9 ⁇ x ⁇ 1.2, 0 ⁇ y ⁇ 0.7, and ⁇ > 0.1.
  • the particle size of the primary particles is 1.6 to 2.3 ⁇ m, the alkali amount on the particle surface measured by two-step neutralization titration is 1.2% by mass or less, and the alkali amount on the particle surface Among them, when lithium hydroxide is A mass% and lithium carbonate is B mass%, A / B is a positive electrode active material for a lithium ion battery of 1 or less.
  • the alkali amount on the particle surface measured by two-step neutralization titration is 0.8% by mass or less.
  • the positive electrode active material for a lithium ion battery according to the present invention has an A / B of 0.7 or less.
  • the positive electrode active material for a lithium ion battery according to the present invention is at least one selected from M and Mn.
  • the positive electrode active material for a lithium ion battery according to the present invention has ⁇ > 0.15 in the composition formula.
  • the positive electrode active material for a lithium ion battery according to the present invention has ⁇ > 0.20 in the composition formula.
  • the present invention is a positive electrode for a lithium ion battery using the positive electrode active material for a lithium ion battery according to the present invention.
  • the present invention is a lithium ion battery using the positive electrode for a lithium ion battery according to the present invention.
  • a positive electrode active material for a lithium ion battery having good battery characteristics can be provided.
  • FIG. 1 is an appearance photograph of primary particles and secondary particles of a positive electrode active material.
  • lithium cobaltate LiCoO 2
  • lithium-containing transition metal oxides such as lithium nickelate (LiNiO 2 ) and lithium manganate (LiMn 2 O 4 ).
  • the positive electrode active material for a lithium ion battery of the present invention produced using such a material is Composition formula: Li x Ni 1- y My O 2 + ⁇
  • M is at least one selected from Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Ga, Ge, Bi, Sn, Mg, Ca, B and Zr; 0.9 ⁇ x ⁇ 1.2, 0 ⁇ y ⁇ 0.7, and ⁇ > 0.1.
  • the ratio of lithium to all metals in the positive electrode active material for a lithium ion battery is 0.9 to 1.2. When the ratio is less than 0.9, it is difficult to maintain a stable crystal structure. This is because the high capacity cannot be secured.
  • oxygen is expressed as O 2 + ⁇ ( ⁇ > 0.1) as described above in the composition formula and is excessively contained. Battery characteristics such as capacity, rate characteristics and capacity retention ratio are improved.
  • ⁇ is preferably ⁇ > 0.15, and more preferably ⁇ > 0.20.
  • the positive electrode active material for lithium ion batteries is composed of primary particles, secondary particles formed by aggregation of primary particles, or a mixture of primary particles and secondary particles (see FIG. 1).
  • the primary particles have a particle size of 1.6 to 2.3 ⁇ m.
  • the particle size of the primary particles is less than 1.6 ⁇ m, there arises a problem that the particles are cracked by a press during battery production or are deteriorated due to particle cracks during battery cycle.
  • the particle size of the primary particles is more than 2.3 ⁇ m, there is a problem of battery deterioration due to the withering of the electrolytic solution or increasing the amount of the electrolytic solution.
  • the particle size of the primary particles is preferably 1.8 to 2.1 ⁇ m.
  • the alkali amount on the particle surface measured by two-step neutralization titration is 1.2% by mass or less.
  • the alkali amount on the particle surface in the positive electrode active material for a lithium ion battery is more than 1.2% by mass, the lithium ion battery using the positive electrode active material reacts with the electrolytic solution while being repeatedly charged and discharged. Further, when the amount of alkali is large, gas is generated. Therefore, the battery deteriorates, and the battery characteristics, particularly the cycle characteristics, of the lithium ion battery become poor.
  • the alkali amount measured by two-step neutralization titration is preferably 0.8% by mass or less, more preferably 0.6% by mass or less.
  • a / B is 1 or less, assuming that lithium hydroxide is A mass% and lithium carbonate is B mass% in the alkali amount on the particle surface.
  • the alkali contained in the positive electrode active material for a lithium ion battery includes lithium hydroxide and lithium carbonate.
  • the A / B which is the ratio of the amount of lithium hydroxide to the amount of lithium carbonate, is more than 1, strong Since the proportion of lithium hydroxide that is an alkali is higher than that of lithium carbonate that is a weak alkali, the pH value becomes high, and the battery characteristics, particularly the cycle characteristics, of a lithium ion battery using the positive electrode active material become poor.
  • a / B is preferably 0.7 or less, and more preferably 0.4 or less.
  • a conventional method can be used, and for example, it is defined by JIS K1201-3-1 (neutralization titration). Specifically, the titration method is based on the following reaction between an alkali and an acid.
  • the positive electrode for a lithium ion battery includes, for example, a positive electrode mixture prepared by mixing a positive electrode active material for a lithium ion battery having the above-described configuration, a conductive additive, and a binder from an aluminum foil or the like.
  • the current collector has a structure provided on one side or both sides.
  • the lithium ion battery which concerns on embodiment of this invention is equipped with the positive electrode for lithium ion batteries of such a structure.
  • a metal salt solution is prepared.
  • the metal is at least one selected from Ni and Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Ga, Ge, Bi, Sn, Mg, Ca, B, and Zr.
  • the metal salt is sulfate, chloride, nitrate, acetate, etc., and nitrate is particularly preferable.
  • each metal contained in the metal salt is adjusted so as to have a desired molar ratio. Thereby, the molar ratio of each metal in the positive electrode active material is determined.
  • lithium carbonate is suspended in pure water, and then the metal salt solution of the metal is added to prepare a metal carbonate solution slurry. At this time, fine particles of lithium-containing carbonate precipitate in the slurry. If the lithium compound does not react during heat treatment such as sulfate or chloride as a metal salt, it is washed with a saturated lithium carbonate solution and then filtered off. When the lithium compound reacts as a lithium raw material during the heat treatment, such as nitrate or acetate, it can be used as a calcined precursor by washing and drying as it is without washing. Next, the lithium-containing carbonate separated by filtration is dried to obtain a lithium salt composite (precursor for lithium ion battery positive electrode material) powder.
  • a lithium salt composite precursor for lithium ion battery positive electrode material
  • a firing container having a predetermined capacity is prepared, and this firing container is filled with a precursor powder for a lithium ion battery positive electrode material.
  • the firing container filled with the precursor powder for the lithium ion battery positive electrode material is transferred to a firing furnace and fired. Firing is performed by heating and holding in an oxygen atmosphere for a predetermined time. Further, it is preferable to perform baking under a pressure of 101 to 202 KPa because the amount of oxygen in the composition further increases.
  • the heating and holding temperature in the firing step affects the primary particle size of the lithium ion battery positive electrode material.
  • the reactivity is weak compared with the case where lithium hydroxide is used as a raw material.
  • the particle size of the primary particles is controlled to 1.6 to 2.3 ⁇ m.
  • the firing temperature is lowered because the reactivity is high, and the firing time is reduced. Therefore, the primary particle size to be generated is as small as about 0.5 ⁇ m. End up.
  • the powder is taken out from the firing container and pulverized using a commercially available pulverizer or the like to obtain a positive electrode active material powder.
  • the crushing at this time is performed by appropriately adjusting the crushing strength and the crushing time so that fine powder is not generated as much as possible.
  • the volume percentage of fine powder having a particle size of 6 ⁇ m or less after the crushing is adjusted to 4.0 to 7.0%, preferably 4.3 to 6.9% by the crushing.
  • the generation of fine powder during crushing in this way, the surface area of the powder per volume is reduced, so that the amount of lithium hydroxide on the particle surface can be suppressed.
  • crushing is performed in a dry air atmosphere so that moisture is not taken in.
  • Examples 1 to 15 First, after suspending lithium carbonate of the input amount shown in Table 1 in 3.2 liters of pure water, 4.8 liter of metal salt solution was charged. Here, the nitrate hydrate of each metal was adjusted so that each metal might become the composition ratio of Table 1, and the total metal mole number might be set to 14 mol.
  • the suspended amount of lithium carbonate was such that the product (lithium ion secondary battery positive electrode material, ie, positive electrode active material) was Li x Ni 1- y My O 2 + ⁇ and x was a value shown in Table 1. Are respectively calculated by the following equations.
  • W (g) 73.9 ⁇ 14 ⁇ (1 + 0.5X) ⁇ A
  • “A” is a numerical value to be multiplied in order to subtract the amount of lithium from the lithium compound other than lithium carbonate remaining in the raw material after filtration from the amount of suspension in addition to the amount necessary for the precipitation reaction. is there.
  • “A” is 0.9 when lithium salt reacts as a firing raw material such as nitrate or acetate, and “1” when lithium salt does not react as a firing raw material such as sulfate or chloride. 0.
  • fine particles of lithium-containing carbonate were precipitated in the solution, and this precipitate was filtered off using a filter press.
  • a lithium-containing carbonate (a precursor for a lithium ion battery positive electrode material).
  • a firing container was prepared, and this firing container was filled with a lithium-containing carbonate.
  • the firing container was placed in an oxygen atmosphere furnace under atmospheric pressure, heated and held at the firing temperature shown in Table 1 for 10 hours, and then cooled to obtain an oxide.
  • a small pulverizer Hosokawa Micron ACM-2EC
  • the obtained oxide is crushed so that the fine powder having a predetermined particle size has a predetermined particle size distribution width, and a lithium ion secondary battery is obtained.
  • a positive electrode powder was obtained.
  • Example 16 Example 16 was carried out except that each raw material had a composition as shown in Table 1, the metal salt was chloride, lithium-containing carbonate was precipitated, washed with a saturated lithium carbonate solution, and filtered. The same treatment as in Examples 1 to 15 was performed.
  • Example 17 Example 17 was carried out except that each material of the raw material had the composition shown in Table 1, the metal salt was sulfate, the lithium-containing carbonate was precipitated, washed with a saturated lithium carbonate solution, and filtered. The same treatment as in Examples 1 to 15 was performed.
  • Example 18 As Example 18, the same processing as in Examples 1 to 15 was performed, except that each metal of the raw material had a composition as shown in Table 1 and calcination was performed not under atmospheric pressure but under a pressure of 120 KPa.
  • Example 19 is the same as Example 19 except that each metal of the raw material has the composition shown in Table 1, the metal salt is nitrate, the lithium-containing carbonate is precipitated, washed with a saturated lithium carbonate solution, and filtered. The same treatment as 1 to 15 was performed.
  • each material of the raw material had a composition as shown in Table 1, and the same as in Examples 1 to 15 except that the final oxide disintegration was not adjusted as in Examples 1 to 15. Processed.
  • Comparative Examples 4 to 6 As Comparative Examples 4 to 6, the same processing as in Comparative Example 1 was performed except that each metal of the raw material had the composition shown in Table 1 and the firing process was performed in an air atmosphere furnace instead of an oxygen atmosphere furnace.
  • the amount of alkali in the positive electrode material was measured by a two-step neutralization titration method. Specifically, 1 g of the powder of each positive electrode material was collected, added to 50 mL of pure water, stirred for 10 minutes, and then filtered. Subsequently, 10 mL of the filtrate and 15 mL of pure water were placed in a 50 mL tall beaker using a macro pipette. Subsequently, a stir bar was placed in a beaker to which phenolphthalein was added as an indicator and placed on a stirrer, and an electrode was set in the beaker. Next, 0.01 N HCl was added dropwise while stirring the solution in the beaker.
  • the two-step neutralization titration method is based on the following reaction between an alkali and an acid.
  • LiOH + HCl ⁇ LiCl + H 2 O (1)
  • Li 2 CO 3 + HCl ⁇ LiCl + LiHCO 3 (2)
  • pH 7.8 was detected, and the measurement point was taken as the first end point.
  • pH 3.9 was detected, and the measurement point was set as the second end point.
  • the amount of HCl used up to the first end point is x (mL)
  • the amount of HCl used up to the second end point is y (mL)
  • the amount of Li 2 CO 3 is (y ⁇ x) ⁇ 0.369.
  • the mass% and the amount of LiOH were determined by (2x ⁇ y) ⁇ 0.12 mass%. Further, the ratio (LiOH amount / Li 2 CO 3 amount) was determined from the calculated LiOH amount and Li 2 CO 3 amount. Note that the calculation formula relating to the amount of Li 2 CO 3 : (yx) ⁇ 0.369 mass% and the calculation formula relating to the amount of LiOH: (2x ⁇ y) ⁇ 0.12 mass% It was derived from.
  • the number of moles of Li 2 CO 3 in (2) above is the same as the number of moles of HCl, the molecular weight of Li 2 CO 3 is 73.89, and 10 ml of 50 ml is used for titration. Since the input amount of the positive electrode material is 1 g, the Li 2 CO 3 amount can be obtained by the following equation.
  • Each positive electrode material, conductive material, and binder are weighed in a ratio of 85: 8: 7, and the positive electrode material and the conductive material are mixed into a slurry in which the binder is dissolved in an organic solvent (N-methylpyrrolidone). And coated on an Al foil, dried and pressed to obtain a positive electrode. Subsequently, a 2032 type coin cell for evaluation with Li as the counter electrode was prepared, and 1M-LiPF 6 dissolved in EC-DMC (1: 1) was used as the electrolyte, and the current density was 0.2C. The discharge capacity was measured.
  • Examples 1 to 19 all had good battery characteristics. In Examples 1 to 15 and 18 in which the starting metal salt was nitrate, the battery characteristics were particularly good. Furthermore, Example 18 in which the firing was performed under pressure rather than atmospheric pressure had the best battery characteristics. In Comparative Examples 1 to 3, the composition of the metal used as a raw material contained oxygen excessively as in the present invention, but the battery characteristics were poor due to the crushing conditions. In Comparative Examples 4 to 6, the composition of the metal used as the raw material was outside the range of the present invention, and the battery characteristics were poor due to the crushing conditions.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Electrode And Active Subsutance (AREA)
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Abstract

Cette invention concerne une matière active d'électrode positive pour un accumulateur lithium-ion présentant de bonnes propriétés d'accumulateur. Ladite matière active d'électrode positive pour accumulateur lithium-ion est représentée par la formule LixNi1-yMyO2+α (où M est un/des élément(s) choisi(s) dans le groupe constitué de : Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Ga, Ge, Bi, Sn, Mg, Ca, B et Zr ; 0,9 < x < 1,2 ; 0 < y < 0,7 ; et α > 0,1). La grosseur du grain des particules primaires va de 1,6 à 2,3 µm. La teneur en alcalis à la surface des particules mesurée par titration en deux étapes au point neutre est inférieure ou égale à 1,2 % en masse. Enfin, en admettant que la quantité d'hydroxyde de lithium est de A % en masse et la quantité de carbonate de lithium est de B % en masse de la teneur en alcalis à la surface des particules, alors A/B est inférieur ou égale à 1.
PCT/JP2012/057976 2011-03-31 2012-03-27 Matière active d'électrode positive pour accumulateur lithium-ion, électrode positive pour accumulateur lithium-ion et accumulateur lithium-ion WO2012133436A1 (fr)

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Cited By (3)

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JP2014194868A (ja) * 2013-03-28 2014-10-09 Jx Nippon Mining & Metals Corp リチウムイオン電池用正極活物質、リチウムイオン電池用正極、及び、リチウムイオン電池
JP2019160572A (ja) * 2018-03-13 2019-09-19 住友化学株式会社 リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極及びリチウム二次電池
EP3955337A4 (fr) * 2019-04-10 2022-06-22 Panasonic Intellectual Property Management Co., Ltd. Électrode positive pour batterie secondaire à électrolyte non aqueux, et batterie secondaire à électrolyte non aqueux

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WO2011108720A1 (fr) * 2010-03-05 2011-09-09 Jx日鉱日石金属株式会社 Matière active d'électrode positive destinée à une batterie au lithium-ion, électrode positive destinée à une batterie au lithium-ion et batterie au lithium-ion

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JP5218782B2 (ja) * 2009-11-27 2013-06-26 戸田工業株式会社 非水電解質二次電池用Ｌｉ−Ｎｉ複合酸化物粒子粉末及びその製造方法、並びに非水電解質二次電池

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JPH09129230A (ja) * 1995-10-31 1997-05-16 Matsushita Electric Ind Co Ltd 非水電解液電池および正極活物質の製造法
JPH10302779A (ja) * 1997-04-25 1998-11-13 Sony Corp 正極活物質の製造方法
JP2003203633A (ja) * 2001-10-25 2003-07-18 Matsushita Electric Ind Co Ltd 正極活物質およびこれを含む非水電解質二次電池
JP2006286336A (ja) * 2005-03-31 2006-10-19 Sanyo Electric Co Ltd 非水電解質二次電池及びその充電方法
JP2007257890A (ja) * 2006-03-20 2007-10-04 Nissan Motor Co Ltd 非水電解質リチウムイオン電池用正極材料およびこれを用いた電池
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014194868A (ja) * 2013-03-28 2014-10-09 Jx Nippon Mining & Metals Corp リチウムイオン電池用正極活物質、リチウムイオン電池用正極、及び、リチウムイオン電池
JP2019160572A (ja) * 2018-03-13 2019-09-19 住友化学株式会社 リチウム金属複合酸化物粉末、リチウム二次電池用正極活物質、正極及びリチウム二次電池
EP3955337A4 (fr) * 2019-04-10 2022-06-22 Panasonic Intellectual Property Management Co., Ltd. Électrode positive pour batterie secondaire à électrolyte non aqueux, et batterie secondaire à électrolyte non aqueux

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